Fluorine-containing silicone pressure sensitive adhesive is widely used

Fluorine-containing silicone pressure-sensitive adhesive is widely used in aviation, environmental protection, communication, medical and other fields.

With the rapid growth of the national economy, more and more fields have higher requirements on the nature of materials, and fluorine-containing silicon materials are widely used in aviation, environmental protection, communications, medicine, and other fields.

However, due to the very complex application environment of materials, it is difficult to compound and fix with other materials. Often need material as an intermediate and has high-temperature resistance, water resistance, oil resistance, aging resistance and other properties – pressure sensitive adhesive, pressure sensitive adhesive is a kind of pressure-sensitive bonding material, that can be instantly bonded at room temperature, only a slight pressure load can be attached to a variety of different substrate surface, substrate peel no residue and other excellent properties.

However, fluorine-containing silicon materials are generally homopolymers with low surface free energy and poor wetting, so they have very low adhesion properties. The crystallinity of fluorine-containing silicon material is large, the chemical stability is good, swelling and dissolution are more difficult than in non-crystalline polymer, and it is difficult to occur molecular chain domain of polymer interdiffusion and entanglement.

The highly symmetrical, non-polar polymer structure can only form a weak dispersion force. The existing types of fluorosilicate-containing pressure-sensitive adhesives are very limited, and there is no steric hindrance effect, and the fluorine carbon chain will appear serious winding phenomenon, resulting in poor water resistance and bonding properties of existing fluorosilicate-containing pressure-sensitive adhesives.

Now provide technical scheme, raw materials: functional monomer containing Penta fluoro benzene 1 ~ 5mol, a functional monomer containing silicon 1 ~ 5mol, soft monomer 3 ~ 8mol, hard monomer 1 ~ 2mol, crosslinking agent 0.5 ~ 3mol, solvent 3 ~ 4mol, initiator of the total molar mass of 0.5 ~ 0.5%. Step 1: Under the protection of argon, add the raw material to the reactor, stir, wash, and dry to obtain pure polymer; Step 2: Apply the polymer to a fluoropolymer material to obtain the pressure-sensitive adhesive.